EP0163592A2 - Tête d'impression matricielle avec guidage réglable des aiguilles d'impression - Google Patents

Tête d'impression matricielle avec guidage réglable des aiguilles d'impression Download PDF

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Publication number
EP0163592A2
EP0163592A2 EP85730018A EP85730018A EP0163592A2 EP 0163592 A2 EP0163592 A2 EP 0163592A2 EP 85730018 A EP85730018 A EP 85730018A EP 85730018 A EP85730018 A EP 85730018A EP 0163592 A2 EP0163592 A2 EP 0163592A2
Authority
EP
European Patent Office
Prior art keywords
adjustment
adjusting member
pressure needle
matrix
magnetic core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85730018A
Other languages
German (de)
English (en)
Other versions
EP0163592B1 (fr
EP0163592A3 (en
Inventor
Harald Dipl.-Ing. Niebel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6232782&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0163592(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19843412854 external-priority patent/DE3412854A1/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT85730018T priority Critical patent/ATE74067T1/de
Publication of EP0163592A2 publication Critical patent/EP0163592A2/fr
Publication of EP0163592A3 publication Critical patent/EP0163592A3/de
Application granted granted Critical
Publication of EP0163592B1 publication Critical patent/EP0163592B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/25—Print wires
    • B41J2/255—Arrangement of the print ends of the wires

Definitions

  • the invention relates to a matrix printhead with an adjustable pressure needle guide, the pressure needle adjustment assembly with the pressure needle adjustment drive and the guide mouthpiece attached to the resilient adjustment member being arranged between the pressure abutment and the pressure needle drive assembly.
  • Such matrix print heads with adjustable print needle guidance are used for writing quick and / or fine writing, the quick writing with the unchanged position of the printing needle guidance being written in successive lines from left to right or from right to left, while the fine writing or a relatively quickly written fine writing is carried out by twice overwriting one and the same line is written in the same direction or opposite pressure passports and adjustment of the pressure needle guide.
  • the needle gap is e.g. from seven to nine needles and can therefore be single column. It is of course possible, provided that the constructively available space in the matrix print head opens up such a construction, also to provide a plurality of adjacent needle gaps, each with seven to nine pressure needles arranged one above the other.
  • Such a matrix print head with an adjustable print needle guide is known (DE-OS 26 32 293), the print head having print wires arranged equidistantly in two columns and the print wire columns being displaceable in the vertical direction relative to one another. It is known that the pressure wires of the columns are each arranged on a carrier element, one of which is arranged vertically displaceably on the print head carriage and the other leaf spring-held at the upper end via an electromagnetically or manually operated cam.
  • the end positions of the guide mouthpiece represent a particular problem, which must be adhered to very precisely because of the printing accuracy desired for fine writing.
  • the invention is therefore based on the object of creating a precise adjustment for the guide mouthpiece with easily manageable manufacturing tolerances, with a flat design in the area of the guide mouthpiece, with simple assembly and with sufficient adjustability of the parts important for the function.
  • the adjusting member is arranged approximately parallel to the printing needles in the area of the printing needles and is in contact with the magnetic core of an electromagnet approximately parallel to the adjusting member and that an armature bridge connected to the magnetic core forms the working air gap with the adjusting member .
  • This invention makes it possible to create a precise adjustment for the guide mouthpiece, to easily master the manufacturing tolerances of the individual parts and to achieve a flat design in spite of the required electromagnet in the region of the guide mouthpiece, and furthermore enables simple assembly, with a safe adjustment of the end positions of the adjusting member becomes. There is also sufficient adjustment of the parts important for the function.
  • the adjusting member consisting of a lever is designed in two parts and the two lever parts are articulated by means of a leaf spring for movement in the vertical plane.
  • This configuration improves the spring property of the known adjusting element in that a lever part can be rigidly designed in and of itself, the spring action being generated by means of the leaf spring.
  • a largely accurate movement of the adjusting member is therefore possible, the pivoting movement of the adjusting member being carried out with a relatively small radius.
  • Such a precise adjustment movement acts in the sense of a largely vertical adjustment in the vertical plane in front of the pressure abutment.
  • a practical embodiment for the accommodation of the individual parts is advantageous in that the electromagnet and the armature bridge are arranged above the adjusting member.
  • the adjustment option is also supported by the fact that the armature bridge is adjustably arranged on the magnetic core of the electromagnet. This measure allows adjustment work to be carried out on the matrix print head during or after assembly and also during operation.
  • an adjustment means which can be actuated from the outside on the printhead housing is provided for the adjustment of the armature bridge. This measure promotes the accessibility of the setting means by the maintenance personnel.
  • the accuracy of the matrix print head according to the invention is further increased in that a fixed stop is provided for an end position of the adjusting member and that the adjusting member is under the force of a spring in the direction of the stop.
  • the matrix print head with adjustable print needle guide is in the writing position opposite the platen 1 or the recording medium la or the ink ribbon 1b, the platen 1 being designed as a platen roller.
  • the print needle drive assembly 2 with all the parts required for firing individual print needles 3 is not described in detail, because in the separate housing 4a of the print head housing 4, components common to the functions of the printer, such as e.g. Electromagnetic coils 5, yoke body 6, folding armature 7, stop 8, pressure needle guide 3a, return spring 9 and rear pressure needle bearing 10 are included, which are only indirectly related to the invention and which can optionally also be selected in a different configuration.
  • the push pin adjustment assembly 11 with the adjustment member 12, to which the guide neck 13 is attached, is located in a separate housing 4b of the printhead housing 4, which is connected to the housing 4a of the printhead housing 4 with the insertion of spacers 14 to the matrix printhead, which is by means of the fixing pins 29 is mounted on the carriage (not shown) of the matrix printer which is moved back and forth in front of the recording medium la.
  • the adjusting member 12 consists of a resilient lever 15 with a plurality of curved lever sections.
  • the guide mouthpiece 13 is fastened to the lever section 15a with a ruby for the printing needles 3.
  • a lever section 15b runs almost parallel to the printing needles 3 and an angled lever section 15c is connected to the housing 4b by means of the screw 16, the screw 16 simultaneously holding the magnetic core 17a with the winding 17b of the electromagnet 17 through the lever section 15c.
  • the armature bridge 18, which forms the working air gap 19 with the lever section 15b is mounted on the magnetic core 17a.
  • the adjusting member 12 can basically consist of a spring 15 made of resilient materials.
  • the movement path of the guide mouthpiece 13 (corresponding to the working air gap 19) for the changeover from quick writing to fine writing is within the limits of 0.01 mm to 1 mm.
  • An average movement path is approximately 0.15 mm.
  • a particularly advantageous design is the two-part design of the lever 15 as an adjusting member 12, the lever section 15b forming a gap 20 due to the division, which is bridged by the leaf spring 21, so that a play-free joint for the movement path in the vertical plane is created.
  • the leaf spring 21 is fixed by spot welding on one lever part and by means of screws 22 on the other lever part of the lever section 15b.
  • the anchor bridge 18 can be adjusted by means of adjusting means 23 which are freely accessible on the housing 4b and which have a threaded screw 23a, in order to adjust or adapt the size of the working air gap 19.
  • the adjusting member 12 is adjustable between end positions which limit the movement path mentioned.
  • the lower end position is formed by the fixed stop 24.
  • a spring 25 presses the lever 15 against the stop 24.
  • the upper end position is limited by the armature bridge 18 or the working air gap 19.
  • the fixed stop 24 is designed so that the adjusting member 12 does not come into contact with the other pressure wire guides 26, 27 and 28.

Landscapes

  • Impact Printers (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Coating With Molten Metal (AREA)
EP85730018A 1984-04-03 1985-02-06 Tête d'impression matricielle avec guidage réglable des aiguilles d'impression Expired - Lifetime EP0163592B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85730018T ATE74067T1 (de) 1984-04-03 1985-02-06 Matrixdruckkopf mit verstellbarer drucknadelfuehrung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412854 1984-04-03
DE19843412854 DE3412854A1 (de) 1984-02-01 1984-04-03 Matrixdruckkopf mit verstellbarer drucknadelfuehrung

Publications (3)

Publication Number Publication Date
EP0163592A2 true EP0163592A2 (fr) 1985-12-04
EP0163592A3 EP0163592A3 (en) 1986-12-03
EP0163592B1 EP0163592B1 (fr) 1992-03-25

Family

ID=6232782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730018A Expired - Lifetime EP0163592B1 (fr) 1984-04-03 1985-02-06 Tête d'impression matricielle avec guidage réglable des aiguilles d'impression

Country Status (4)

Country Link
US (1) US5071270A (fr)
EP (1) EP0163592B1 (fr)
JP (1) JPS60217166A (fr)
AT (1) ATE74067T1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2535699C3 (de) * 1975-08-09 1978-12-14 Olympia Werke Ag, 2940 Wilhelmshaven Verfahren und Drucker zur Herstellung von feingerasterten Schriftzeichen auf einem Aufzeichnungsträger
JPS5627363A (en) * 1979-08-15 1981-03-17 Canon Inc Wire dot printing head
US4459051A (en) * 1979-08-15 1984-07-10 Canon Kabushiki Kaisha Matrix printer
JPS5662165A (en) * 1979-10-29 1981-05-27 Seikosha Co Ltd Serial dot printer
JPS5747675A (en) * 1980-09-05 1982-03-18 Nippon Telegr & Teleph Corp <Ntt> Driving of wire dot printer
DE3041877A1 (de) * 1980-11-06 1982-05-13 Mannesmann AG, 4000 Düsseldorf Matrixdrucker und zugehoeriger nadeldruckkopf
US4640633A (en) * 1984-03-22 1987-02-03 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus

Also Published As

Publication number Publication date
US5071270A (en) 1991-12-10
ATE74067T1 (de) 1992-04-15
EP0163592B1 (fr) 1992-03-25
JPS60217166A (ja) 1985-10-30
JPH0431312B2 (fr) 1992-05-26
EP0163592A3 (en) 1986-12-03

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